al/eax/utils.h

   1 #ifndef EAX_UTILS_INCLUDED
   2 #define EAX_UTILS_INCLUDED
   3
   4 #include <algorithm>
   5 #include <cstdint>
   6 #include <string>
   7 #include <string_view>
   8 #include <type_traits>
   9
  10 #include "opthelpers.h"
  11
  12 using EaxDirtyFlags = unsigned int;
  13
  14 struct EaxAlLowPassParam {
  15     float gain;
  16     float gain_hf;
  17 };
  18
  19 void eax_log_exception(std::string_view message) noexcept;
  20
  21 template<typename TException, typename TValue>
  22 void eax_validate_range(std::string_view value_name, const TValue& value, const TValue& min_value,
  23     const TValue& max_value)
  24 {
  25     if(value >= min_value && value <= max_value) LIKELY
  26         return;
  27
  28     const auto message =
  29         std::string{value_name} +
  30         " out of range (value: " +
  31         std::to_string(value) + "; min: " +
  32         std::to_string(min_value) + "; max: " +
  33         std::to_string(max_value) + ").";
  34
  35     throw TException{message.c_str()};
  36 }
  37
  38 namespace detail {
  39
  40 template<typename T>
  41 struct EaxIsBitFieldStruct {
  42 private:
  43     using yes = std::true_type;
  44     using no = std::false_type;
  45
  46     template<typename U>
  47     static auto test(int) -> decltype(std::declval<typename U::EaxIsBitFieldStruct>(), yes{});
  48
  49     template<typename>
  50     static no test(...);
  51
  52 public:
  53     static constexpr auto value = std::is_same<decltype(test<T>(0)), yes>::value;
  54 };
  55
  56 template<typename T, typename TValue>
  57 inline bool eax_bit_fields_are_equal(const T& lhs, const T& rhs) noexcept
  58 {
  59     static_assert(sizeof(T) == sizeof(TValue), "Invalid type size.");
  60     return reinterpret_cast<const TValue&>(lhs) == reinterpret_cast<const TValue&>(rhs);
  61 }
  62
  63 } // namespace detail
  64
  65 template<
  66     typename T,
  67     std::enable_if_t<detail::EaxIsBitFieldStruct<T>::value, int> = 0
  68 >
  69 inline bool operator==(const T& lhs, const T& rhs) noexcept
  70 {
  71     using Value = std::conditional_t<
  72         sizeof(T) == 1,
  73         std::uint8_t,
  74         std::conditional_t<
  75             sizeof(T) == 2,
  76             std::uint16_t,
  77             std::conditional_t<
  78                 sizeof(T) == 4,
  79                 std::uint32_t,
  80                 void>>>;
  81
  82     static_assert(!std::is_same<Value, void>::value, "Unsupported type.");
  83     return detail::eax_bit_fields_are_equal<T, Value>(lhs, rhs);
  84 }
  85
  86 template<
  87     typename T,
  88     std::enable_if_t<detail::EaxIsBitFieldStruct<T>::value, int> = 0
  89 >
  90 inline bool operator!=(const T& lhs, const T& rhs) noexcept
  91 {
  92     return !(lhs == rhs);
  93 }
  94
  95 #endif // !EAX_UTILS_INCLUDED